feat: add arp-scan to the container image

Author: miguelangel-nubla

Dockerfile.goreleaser

@@ -4,6 +4,7 @@ RUN apk add --no-cache \
     bash \
     iputils \
     iproute2 \
+    arp-scan \
     curl \
     ca-certificates \
     bind-tools \

README.md

@@ -219,14 +219,7 @@ tasks:
 
 For more advanced use cases just write a custom script that returns the IPv4s you need.
 
-```yaml
-...
-tasks:
-  myhome:
-    ipv4:
-      interval: 30s
-      command: ./print_desired_ipv4s.sh
-      args: []
-      lifetime: 4m
-...
-```
+If you want to do the same MAC to address auto discovery in IPv4:
+`ip neigh show | grep -i "00:11:22:33:44:55" | awk '{print $1}'`
+or
+`arp-scan --localnet | grep -i "00:11:22:33:44:55" | awk '{print $1}'`